Improvement in brick-molds



J. TREADWAY. Brick-Molds.

Patentd Nov. 24,1874.

momms.

WITNESSES LACE, N .Y.

THE SRA UNITED STATES PATENT QFFIGE.

JOHN TBEADWAY, OF HAVERSTRAW, NEW YORK.

IMPROVEMENT IN BRlCK-MOLDS.

Specification forming part of Letters Patent No. 157,247, dated November 24, 1874; application filed July 3, 1874.

To all whom it may concern:

Be it known that I, JOHN TREADWAY, of Haverstraw, Rockland county, New York, have invented a new and useful Improvement in Molding and Pressing Brick, of which the following is a specification:

This invention relates to machines for molding and pressing brick from clay and consists of a removable key or wedge-block placed beneath the reciprocating plunger of the machine and above the platform, whereby the amount of pressure on the brick is raised according to the quantity or condition of clay in the mold.

In the accompanying drawing, Figure 1 represents an upright frame composed of two slotted side plates with a solid beam. Fig. 2 is a View of the same in a different position; and Fig. 3 is a perspective view of the improved key or wedge-block, the construction of which constitutes my invention. Fig. 4 is a vertical elevation of a portion of a brickmachine, showing the relative arrangement of the parts which coact with my invention.

Similar letters of reference indicate corresponding parts.

The plunger or bar (seen in dotted lines) is attached to a crank at its upper end, from which it receives a vertical reciprocating motion. The lower end of this plunger rests on a key or block. The plunger is attached to the frame, and the lower solid end of the frame rests on the platen, which imparts the pressure to the clay in the mold.

The construction of the brick-machine to which this improvement is applied is more particularly described'in Letters Patent of the United States which were granted to me dated December 12, 1871, No. 121,825.

As the present invention applies only to the key it is not deemed necessary to describe anything more than its construction, and the duty it performs.

A is the key. B B are the slotted plates, and O the solid base, which forms the reciprocating frame in which the key isused. D is the plunger. (Seen in dotted lines in Fig. 2.) Frepresents notches in the plates B B, through which the key is passed, as seen in Fig. 1. The upper shoulders g g of these notches are points of resistance.

In my patented machine above referred to, this key is made with two plain, flat, and nearly parallel top and bottom sides. To this plain key I add a section, H, to one of the sides, so that by turnii'ig it over it will vary the distance which the plunger will descend, and, consequently, vary the pressure on the clay.

In the operation of molding and pressing brick it is well known that the clay is not of uniform consistency, and the molds are not always filled to the same height and compactness, and, consequently, it is necessary to vary the pressure to insure a perfect brick. The attendant is enabled to do this by reversing the single key A, thus saving much time and trouble, besides being enabled to produce more perfect brick than by the old method.

Having thus described my invention, I claim as new and desire to secure by Letters Patent- In combination with a brick-machine, the improved key A, having the section H, substantially as and for the purposes described.

JOHN TREADWAY. Witnesses:

T. B. MOSHER.

ALEX. F. RoBERTs. 

